/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.usergrid.settings

import java.io.{PrintWriter, FileOutputStream}
import java.net.URLDecoder
import java.util
import java.util.concurrent.TimeUnit
import java.util.concurrent.atomic.AtomicInteger
import javax.xml.bind.DatatypeConverter
import io.gatling.http.Predef._
import io.gatling.core.Predef._
import io.gatling.http.config.HttpProtocolBuilder
import org.apache.usergrid.datagenerators.FeederGenerator
import org.apache.usergrid.enums._
import org.apache.usergrid.helpers.Utils
import scala.collection.mutable

object Settings {

  def initStrSetting(cfg: String): String = {
    val setting = System.getProperty(cfg)

    if (setting != null) setting else ConfigProperties.getDefault(cfg).toString
  }

  def initBoolSetting(cfg: String): Boolean = {
    val strSetting = System.getProperty(cfg)
    val default:Boolean = ConfigProperties.getDefault(cfg).asInstanceOf[Boolean]

    if (strSetting != null) {
      if (default) // default is true
        strSetting.toLowerCase != "false"
      else // default is false
        strSetting.toLowerCase == "true"
    } else {
      default
    }
  }

  def initIntSetting(cfg: String): Int = {
    val integerSetting:Integer = Integer.getInteger(cfg)

    if (integerSetting != null)
      integerSetting.toInt
    else
      ConfigProperties.getDefault(cfg).asInstanceOf[Int]
  }

  def initLongSetting(cfg: String): Long = {
    val longSetting:java.lang.Long = java.lang.Long.getLong(cfg)

    if (longSetting != null)
      longSetting.toLong
    else
      ConfigProperties.getDefault(cfg).asInstanceOf[Long]
  }

  // load configuration settings via property or default
  val org = initStrSetting(ConfigProperties.Org)
  val app = initStrSetting(ConfigProperties.App)
  val allApps: Boolean = app == "*"
  val adminUser = initStrSetting(ConfigProperties.AdminUser)
  val adminPassword = initStrSetting(ConfigProperties.AdminPassword)

  private val cfgBaseUrl = initStrSetting(ConfigProperties.BaseUrl)
  val baseUrl = if (cfgBaseUrl.takeRight(1) == "/") cfgBaseUrl.dropRight(1) else cfgBaseUrl
  def orgUrl(org: String): String = {
    baseUrl + "/" + org
  }
  def appUrl(app: String): String = {
    orgUrl(org) + "/" + app
  }
  val managementUrl = baseUrl + "/management/organizations" + org
  val baseOrgUrl = orgUrl(org)
  val baseAppUrl = appUrl(app)

  private def httpConf(baseUrl: String): HttpProtocolBuilder = {
    http
      .baseURL(baseUrl)
      .connection("keep-alive")
      .extraInfoExtractor {
        i =>
          if (Settings.printFailedRequests && i.status == io.gatling.core.result.message.KO) {
            println(s"==============")
            println(s"Request: ${i.request.getMethod} ${i.request.getUrl}")
            println(s"body:")
            println(s"  ${i.request.getStringData}")
            println(s"==============")
            println(s"Response: ${i.response.statusCode.getOrElse(-1)}")
            println(s"body:")
            println(s"  ${i.response.body.string}")
            println(s"==============")
          }
          Nil
      }
  }
  val httpOrgConf: HttpProtocolBuilder = httpConf(baseOrgUrl)
  val httpAppConf: HttpProtocolBuilder = httpConf(baseAppUrl)
  val authType = initStrSetting(ConfigProperties.AuthType)
  val tokenType = initStrSetting(ConfigProperties.TokenType)

  val skipSetup:Boolean = initBoolSetting(ConfigProperties.SkipSetup)
  val createOrg:Boolean = !skipSetup && initBoolSetting(ConfigProperties.CreateOrg)
  val createApp:Boolean = !skipSetup && initBoolSetting(ConfigProperties.CreateApp)
  val loadEntities:Boolean = !skipSetup && initBoolSetting(ConfigProperties.LoadEntities)
  val sandboxCollection:Boolean = initBoolSetting(ConfigProperties.SandboxCollection)
  val scenarioType = initStrSetting(ConfigProperties.ScenarioType)

  val rampUsers:Int = initIntSetting(ConfigProperties.RampUsers)
  val constantUsersPerSec:Int = initIntSetting(ConfigProperties.ConstantUsersPerSec) // users to add per second during constant injection
  val constantUsersDuration:Int = initIntSetting(ConfigProperties.ConstantUsersDuration) // number of seconds
  val totalUsers:Int = rampUsers + (constantUsersPerSec * constantUsersDuration)
  val userSeed:Int = initIntSetting(ConfigProperties.UserSeed)
  val appUser = initStrSetting(ConfigProperties.AppUser)
  val appUserPassword = initStrSetting(ConfigProperties.AppUserPassword)

  // val appUserBase64 = Base64.getEncoder.encodeToString((appUser + ":" + appUserPassword).getBytes(StandardCharsets.UTF_8))
  val appUserBase64: String = DatatypeConverter.printBase64Binary((appUser + ":" + appUserPassword).getBytes("UTF-8"))

  val totalNumEntities:Int = initIntSetting(ConfigProperties.NumEntities)
  val numDevices:Int = initIntSetting(ConfigProperties.NumDevices)

  val collection = initStrSetting(ConfigProperties.Collection)
  val baseCollectionUrl = baseAppUrl + "/" + collection

  val rampTime:Int = initIntSetting(ConfigProperties.RampTime) // in seconds
  val throttle:Int = initIntSetting(ConfigProperties.Throttle) // in seconds
  val holdDuration:Int = initIntSetting(ConfigProperties.HoldDuration) // in seconds

  // Geolocation settings
  val centerLatitude:Double = 37.442348 // latitude of center point
  val centerLongitude:Double = -122.138268 // longitude of center point
  val userLocationRadius:Double = 32000 // location of requesting user in meters
  val geoSearchRadius:Int = 8000 // search area in meters

  // Push Notification settings
  val pushNotifier = initStrSetting(ConfigProperties.PushNotifier)
  val pushProvider = initStrSetting(ConfigProperties.PushProvider)

  // Large Entity Collection settings
  val entityPrefix = initStrSetting(ConfigProperties.EntityPrefix)
  val entityType = initStrSetting(ConfigProperties.EntityType) // basic/trivial/?
  val overallEntitySeed = initIntSetting(ConfigProperties.EntitySeed)
  val searchLimit:Int = initIntSetting(ConfigProperties.SearchLimit)
  val searchQuery = initStrSetting(ConfigProperties.SearchQuery)
  val endConditionType = initStrSetting(ConfigProperties.EndConditionType)
  val endMinutes:Int = initIntSetting(ConfigProperties.EndMinutes)
  val endRequestCount:Int = initIntSetting(ConfigProperties.EndRequestCount)

  // Org creation fields
  private val cfgOrgCreationUsername = initStrSetting(ConfigProperties.OrgCreationUsername)
  private val cfgOrgCreationEmail = initStrSetting(ConfigProperties.OrgCreationEmail)
  private val cfgOrgCreationName = initStrSetting(ConfigProperties.OrgCreationName)
  val orgCreationUsername = if (cfgOrgCreationUsername == "") org.concat("_admin") else cfgOrgCreationUsername
  val orgCreationEmail = if (cfgOrgCreationEmail == "") orgCreationUsername.concat("@usergrid.com") else cfgOrgCreationEmail
  val orgCreationName = if (cfgOrgCreationName == "") orgCreationUsername else cfgOrgCreationName
  val orgCreationPassword = initStrSetting(ConfigProperties.OrgCreationPassword)

  val retryCount:Int = initIntSetting(ConfigProperties.RetryCount)
  val laterThanTimestamp:Long = initLongSetting(ConfigProperties.LaterThanTimestamp)
  val entityProgressCount:Long = initLongSetting(ConfigProperties.EntityProgressCount)
  private val logEntityProgress: Boolean = entityProgressCount > 0L
  val injectionList = initStrSetting(ConfigProperties.InjectionList)
  val printFailedRequests:Boolean = initBoolSetting(ConfigProperties.PrintFailedRequests)
  val getViaQuery:Boolean = initBoolSetting(ConfigProperties.GetViaQuery)
  private val queryParamConfig = initStrSetting(ConfigProperties.QueryParams)
  val queryParamMap: Map[String,String] = mapFromQueryParamConfigString(queryParamConfig)

  val multiPropertyPrefix = initStrSetting(ConfigProperties.MultiPropertyPrefix)
  val multiPropertyCount:Int = initIntSetting(ConfigProperties.MultiPropertyCount)
  val multiPropertySizeInK:Int = initIntSetting(ConfigProperties.MultiPropertySizeInK)
  val entityNumberProperty = initStrSetting(ConfigProperties.EntityNumberProperty)

  // Entity update
  val updateProperty = initStrSetting(ConfigProperties.UpdateProperty)
  val updateValue = initStrSetting(ConfigProperties.UpdateValue)
  val updateBody = Utils.toJSONStr(Map(updateProperty -> updateValue))

  // Entity workers
  private val cfgEntityWorkerCount:Int = initIntSetting(ConfigProperties.EntityWorkerCount)
  private val cfgEntityWorkerNum:Int = initIntSetting(ConfigProperties.EntityWorkerNum)
  val useWorkers:Boolean = cfgEntityWorkerCount > 1 && cfgEntityWorkerNum >= 1 && cfgEntityWorkerNum <= cfgEntityWorkerCount
  val entityWorkerCount:Int = if (useWorkers) cfgEntityWorkerCount else 1
  val entityWorkerNum:Int = if (useWorkers) cfgEntityWorkerNum else 1

  // if only one worker system, these numbers will still be fine
  private val entitiesPerWorkerFloor:Int = totalNumEntities / entityWorkerCount
  private val leftOver:Int = totalNumEntities % entityWorkerCount  // will be 0 if only one worker
  private val extraEntity:Int = if (entityWorkerNum <= leftOver) 1 else 0
  private val zeroBasedWorkerNum:Int = entityWorkerNum - 1
  val entitySeed:Int = overallEntitySeed + zeroBasedWorkerNum * entitiesPerWorkerFloor + (if (extraEntity == 1) zeroBasedWorkerNum else leftOver)
  val numEntities:Int = entitiesPerWorkerFloor + extraEntity

  // UUID log file, have to go through this because creating a csv feeder with an invalid csv file fails at maven compile time
  private val dummyTestCsv = ConfigProperties.getDefault(ConfigProperties.UuidFilename).toString
  private val dummyAuditCsv = ConfigProperties.getDefault(ConfigProperties.AuditUuidFilename).toString
  private val dummyAuditFailedCsv = ConfigProperties.getDefault(ConfigProperties.FailedUuidFilename).toString
  private val dummyCaptureCsv = "/tmp/notused.csv"

  private val uuidFilename = initStrSetting(ConfigProperties.UuidFilename)
  private val auditUuidFilename = initStrSetting(ConfigProperties.AuditUuidFilename)
  private val failedUuidFilename = initStrSetting(ConfigProperties.FailedUuidFilename)

  // feeds require valid files, even if test won't be run
  val feedUuids = scenarioType match {
    case ScenarioType.UuidRandomInfinite => true
    case _ => false
  }
  val feedUuidFilename = scenarioType match {
    case ScenarioType.UuidRandomInfinite => uuidFilename
    case _ => dummyTestCsv
  }
  if (feedUuids && feedUuidFilename == dummyTestCsv) {
    println("Scenario requires CSV file containing UUIDs")
    System.exit(1)
  }

  val feedAuditUuids = scenarioType match {
    case ScenarioType.AuditVerifyCollectionEntities => true
    case _ => false
  }
  val feedAuditUuidFilename = scenarioType match {
    case ScenarioType.AuditVerifyCollectionEntities => auditUuidFilename
    case _ => dummyAuditCsv
  }
  if (feedAuditUuids && feedAuditUuidFilename == dummyAuditCsv) {
    println("Scenario requires CSV file containing audit UUIDs")
    System.exit(1)
  }

  val captureUuidFilename = scenarioType match {
    case ScenarioType.LoadEntities => uuidFilename
    case ScenarioType.GetByNameSequential => uuidFilename
    case _ => dummyCaptureCsv   // won't write to this file
  }
  val captureUuids = if (captureUuidFilename == dummyCaptureCsv) false
    else scenarioType match {
      case ScenarioType.LoadEntities => true
      case ScenarioType.GetByNameSequential => true
      case _ => false
    }

  val captureAuditUuidFilename = scenarioType match {
    case ScenarioType.AuditGetCollectionEntities => auditUuidFilename
    case ScenarioType.AuditVerifyCollectionEntities => failedUuidFilename
    case _ => dummyCaptureCsv   // won't write to this file
  }
  if (scenarioType == ScenarioType.AuditGetCollectionEntities && captureAuditUuidFilename == dummyCaptureCsv) {
    println("Scenario requires CSV file location to capture audit UUIDs")
    System.exit(1)
  }
  val captureAuditUuids = (scenarioType == ScenarioType.AuditGetCollectionEntities) ||
                          (scenarioType == ScenarioType.AuditVerifyCollectionEntities && captureAuditUuidFilename != dummyAuditFailedCsv)

  /*
  println(s"feedUuids=$feedUuids")
  println(s"feedUuidFilename=$feedUuidFilename")
  println(s"feedAuditUuids=$feedAuditUuids")
  println(s"feedAuditUuidFilename=$feedAuditUuidFilename")
  println(s"captureUuids=$captureUuids")
  println(s"captureUuidFilename=$captureUuidFilename")
  println(s"captureAuditUuids=$captureAuditUuids")
  println(s"captureAuditUuidFilename=$captureAuditUuidFilename")
  */

  val purgeUsers:Int = initIntSetting(ConfigProperties.PurgeUsers)

  private var uuidMap: Map[Int, String] = Map()
  private var entityCounter: Long = 0
  private var lastEntityCountPrinted: Long = 0
  def addUuid(num: Int, uuid: String): Unit = {
    if (captureUuids) {
      uuidMap.synchronized {
        uuidMap += (num -> uuid)
        entityCounter += 1
        if (logEntityProgress && (entityCounter >= lastEntityCountPrinted + entityProgressCount)) {
          println(s"Entity: $entityCounter")
          lastEntityCountPrinted = entityCounter
        }
      }
    }
    // println(s"UUID: ${name},${uuid}")
  }

  def writeUuidsToFile(): Unit = {
    if (captureUuids) {
      val writer = {
        val fos = new FileOutputStream(captureUuidFilename)
        new PrintWriter(fos, false)
      }
      writer.println("name,uuid")
      val uuidList: List[(Int, String)] = uuidMap.toList.sortBy(l => l._1)
      uuidList.foreach { l =>
        writer.println(s"${Settings.entityPrefix}${l._1},${l._2}")
      }
      writer.flush()
      writer.close()
    }
  }


  val auditUuidsHeader = "collection,name,uuid,modified"

  case class AuditList(var collection: String, var entityName: String, var uuid: String, var modified: Long)

  // key: uuid, value: collection
  private var auditEntityCounter: Long = 0
  private var lastAuditEntityCountPrinted: Long = 0
  private var auditUuidList: mutable.MutableList[AuditList] = mutable.MutableList[AuditList]()
  def addAuditUuid(uuid: String, collection: String, entityName: String, modified: Long): Unit = {
    if (captureAuditUuids) {
      auditUuidList.synchronized {
        auditUuidList += AuditList(collection, entityName, uuid, modified)
        auditEntityCounter += 1
        if (logEntityProgress && (auditEntityCounter >= lastAuditEntityCountPrinted + entityProgressCount)) {
          println(s"Entity: $auditEntityCounter")
          lastAuditEntityCountPrinted = auditEntityCounter
        }
      }
    }
  }

  def writeAuditUuidsToFile(uuidDesc: String): Unit = {
    if (captureAuditUuids) {
      println(s"Sorting and writing ${auditUuidList.size} $uuidDesc UUIDs in CSV file $captureAuditUuidFilename")
      val writer = {
        val fos = new FileOutputStream(captureAuditUuidFilename)
        new PrintWriter(fos, false)
      }
      writer.println(auditUuidsHeader)
      val uuidList: List[AuditList] = auditUuidList.toList.sortBy(e => (e.collection, e.entityName, e.modified))
      uuidList.foreach { e =>
        writer.println(s"${e.collection},${e.entityName},${e.uuid},${e.modified}")
      }
      writer.flush()
      writer.close()
    }
  }

  def getUserFeeder:Array[Map[String, String]]= {
    FeederGenerator.generateUserWithGeolocationFeeder(totalUsers, userLocationRadius, centerLatitude, centerLongitude)
  }

  def getInfiniteUserFeeder:Iterator[Map[String, String]]= {
    FeederGenerator.generateUserWithGeolocationFeederInfinite(userSeed, userLocationRadius, centerLatitude, centerLongitude)
  }

  private var testStartTime: Long = System.currentTimeMillis()
  private var testEndTime: Long = 0

  def getTestStartTime: Long = {
    testStartTime
  }

  def setTestStartTime(): Unit = {
    testStartTime = System.currentTimeMillis()
  }

  def setTestEndTime(): Unit = {
    testEndTime = System.currentTimeMillis()
  }

  def continueMinutesTest: Boolean = {
    (System.currentTimeMillis() - testStartTime) < (endMinutes.toLong*60L*1000L)
  }

  private val countAuditSuccess = new AtomicInteger(0)
  private val countAuditNotFound = new AtomicInteger(0)
  private val countAuditBadResponse = new AtomicInteger(0)

  def incAuditSuccess(): Unit = {
    countAuditSuccess.incrementAndGet()
  }

  def incAuditNotFound(): Unit = {
    countAuditNotFound.incrementAndGet()
  }

  def incAuditBadResponse(): Unit = {
    countAuditBadResponse.incrementAndGet()
  }

  def printAuditResults(): Unit = {
    if (scenarioType == ScenarioType.AuditVerifyCollectionEntities) {
      val countSuccess = countAuditSuccess.get
      val countNotFound = countAuditNotFound.get
      val countBadResponse = countAuditBadResponse.get
      val countTotal = countSuccess + countNotFound + countBadResponse

      val seconds = ((testEndTime - testStartTime) / 1000).toInt
      val s:Int = seconds % 60
      val m:Int = (seconds/60) % 60
      val h:Int = seconds/(60*60)
      val elapsedStr = f"$h%d:$m%02d:$s%02d"

      println()
      println("-----------------------------------------------------------------------------")
      println("AUDIT RESULTS")
      println("-----------------------------------------------------------------------------")
      println()
      println(s"Successful:          $countSuccess")
      println(s"Not Found:           $countNotFound")
      println(s"Bad Response:        $countBadResponse")
      println(s"Total:               $countTotal")
      println()
      println(s"Start Timestamp(ms): $testStartTime")
      println(s"End Timestamp(ms):   $testEndTime")
      println(s"Elapsed Time:        $elapsedStr")
      println()
      println("-----------------------------------------------------------------------------")
      println()
    }
  }

  def printSettingsSummary(afterTest: Boolean): Unit = {
    val authTypeStr = authType + (if (authType == AuthType.Token) s"($tokenType)" else "")
    val endConditionStr = if (endConditionType == EndConditionType.MinutesElapsed) s"$endMinutes minutes elapsed" else s"$endRequestCount requests"
    val seconds = ((testEndTime - testStartTime) / 1000).toInt
    val s:Int = seconds % 60
    val m:Int = (seconds/60) % 60
    val h:Int = seconds/(60*60)
    val elapsedStr = f"$h%d:$m%02d:$s%02d"
    println()
    println("-----------------------------------------------------------------------------")
    println("SIMULATION SETTINGS")
    println("-----------------------------------------------------------------------------")
    println()
    println(s"ScenarioType:$scenarioType  AuthType:$authTypeStr")
    println()
    println(s"BaseURL:$baseUrl")
    println(s"Org:$org  App:$app  Collection:$collection")
    println(s"CreateOrg:$createOrg  CreateApp:$createApp  LoadEntities:$loadEntities")
    println(s"SandboxCollection:$sandboxCollection  SkipSetup:$skipSetup")
    println(s"AuthType:$authType  TokenType:$tokenType  AdminUser:$adminUser")
    println()
    println(s"EntityType:$entityType  Prefix:$entityPrefix RetryCount:$retryCount")
    if (scenarioType == ScenarioType.AuditGetCollectionEntities && laterThanTimestamp > 0) {
      if (laterThanTimestamp > 0) println(s"SearchLimit:$searchLimit  OnlyForEntriesAtOrLater:$laterThanTimestamp")
    } else {
      println(s"SearchLimit:$searchLimit  SearchQuery:$searchQuery")
    }
    println()
    println(s"Overall: NumEntities:$totalNumEntities  Seed:$overallEntitySeed  Workers:$entityWorkerCount")
    println(s"Worker:  NumEntities:$numEntities  Seed:$entitySeed  WorkerNum:$entityWorkerNum")
    println()
    println(s"Ramp: Users:$rampUsers  Time:$rampTime")
    println(s"Constant: UsersPerSec:$constantUsersPerSec  Time:$constantUsersDuration")
    println(s"EndCondition:$endConditionStr")
    println()
    if (feedUuids) println(s"Feed CSV: $feedUuidFilename")
    if (feedAuditUuids) println(s"Audit Feed CSV: $feedAuditUuidFilename")
    if (captureUuids) println(s"Capture CSV:$captureUuidFilename")
    if (captureAuditUuids) {
      if (scenarioType == ScenarioType.AuditVerifyCollectionEntities)
        println(s"Audit Capture CSV (failed entities):$captureAuditUuidFilename")
      else
        println(s"Audit Capture CSV:$captureAuditUuidFilename")
    }
    println()
    println()
    if (afterTest) {
      println(s"TestStarted:$testStartTime  TestEnded:$testEndTime Elapsed: $elapsedStr")
    } else {
      println(s"TestStarted:$testStartTime")
    }
    println()
    println("-----------------------------------------------------------------------------")
    println()
  }

  def mapFromQueryParamConfigString(queryParamConfigString: String): Map[String,String] = {
    val params = mutable.Map[String,String]()
    val paramStrings:Array[String] = queryParamConfigString split "&"
    for (i <- paramStrings.indices) {
      val param = paramStrings(i)
      val pair = param split "="
      val key = URLDecoder.decode(pair(0), "UTF-8")
      val value = pair.length match  {
        case l if l > 1 => URLDecoder.decode(pair(1), "UTF-8")
        case _ => ""
      }
      params(key) = value
      println(s"QueryParam $key = $value")
    }
    params.toMap
  }

  printSettingsSummary(false)

}